1. Material: ABS 2. Slide the button to open or close the vents 3. Magnetic switch design, not easy to wear, easy to open and close 4. Switchable vent + mirror to solve odor and easy to wear 5. Water corrugated non-slip silicone pad helps reduce braces wear 6. Lightweight and ultra-thin, feel comfortable 7. Easy to wash and keep clean 8. Weight: 66.8 grams 9. Dimensions: 88x88x26mm
